Manufacture of coloring-matters.



more s 'rarns Parent]? oriuon.

OTTO SIEPERMANN, OF EAST ORANGE,

NEW JERSEY, ASSIGNOR TO CONSOLIDATED COLOR & CHEMICAL (30., OF NEWARK,NEW JERSEY, A. CORPORATION OF NEW JERSEY.

MANUFACTURE OF COLORING-MATTERS.

No Drawing.

Specification of Letters Patent.

Patented Sept. 23, 1913.

To all vivid/TL it may concern l te it known that I, ()T'ro SrnrnnnANNdoctor of philosophy, a citizen of the Uniter States residing at EastOrange, county of l'ls State of New Jersey, have invented new and usefulImprovements in the Manul'acture ot' Coloring-Matters, of which thefollowing is a full, clear, and exact description.

My invention consists in the mamrfacture of coloring matters from twomolecules ol bcta-naphtliylanlin-n'lrmo-sultonic acid and one moleculeof hetanaphthol. which coloring matters possess the valuable property ofbeing converted into new and novel lakes of great value.

My new lake-forming coloring matter is preferably produced as follows:--25 grams of the n'lono-sultonic acid of heta-naph thylamin--( 2':l)(89%) are dissolved in an aqueous solution of (3A grams sodiumcarbonate. This solution is filtered to remove any insoluble impurities,diluted to about 400 c. c. with water and a solution of 7.2 grams sodiumnitrite (96%) dissolved in about 5 r. c. of water are slowly added withconstant stirring. 50 grams muriatic acid 20 degrees B6. are dilutedwith 50 c. 0. water and cooled with ice to a temperature of from 0degrees cent. to 5 rilcgrees cent. The above cooled solution ofbeta-naphthylamin-monosull'onic acid, sodium carbonate and sodiumnitrite is then allowed to run slowly into the cooled solution ofmuriatic acid with con stant stirring in order to form the diazo body.

27 grams ot' beta-naphthylamiii-monosulit'onie acid (2:1) (89%) aredissolved as abrwe in an vaqueous solution of 6.4 grams of sodiumcarbonate acid diluted to about 800 c. c. and cooled. This solution isrun slowly into the above mentioned diazo body. after the latter hasbeen stirred for about thirty minutes, care being taken that thetemperature does not rise above 16 do {Irv-cs cent. This mixture is thenstirred un til the, amido-azo body is thoroughly formed, which. isusually effected in about threequarters of an hour. -The thus formedarnido-azo compound is then cooled at 5 degrees cent. to 10 degreescent. and a solution of 7.2 grams sodium nitrite (96%) is added and themixture stirrcd until the diazo compound is thoroughly formed 1 1usubeta-naphthylamin-mono-sultonic acid ally requires about three hours.This diazotized amidonzo compound is of a light chocolate brown colorand almost insoluble inwater.

23 grams of heta-naphthol, 21 grams cans tic soda (36 degrees no. and 7grams sodium carbonate are dissolved in water, preterably but notnecessarily with 1!) grams para soap, resin soap, or Turkey red oil, andthe whole diluted to 2000 c. c. hen this solution is cool the abovementioned diazotized amido-azo compound is run into it slowly withconstant stirring. When the reaction l'ietwccn the beta-naphthol and thediazotized amido-azo body' is thoroughly completed, the color isfiltered off, and pressed into the required consistency for theformation of lake colors. The resulting coloring matter is in theform ofa bright scarlet paste, which when dried is a bright scarlet powderinsoluble in water, but which dissolves in concentrated sulfuric acidwith a dark crimson color, having a very blue undertone, the colors notchanging upon standing for fifteen hours. Upon reduction the coloryields amido-naphthalcne-monosultonic acid,diamido-naphthalene-monosulfonic acid and amido-naphthol, and which mostprobably has the following formula:

This color possesses the important property of forming very valuablelakes with metallic salts and the alkaline earths. The lakes from someof these salts and earths are of a bright red shade, with a decided blueundertone, are insoluble in water and van nish oils, and are extremelyfast to light and lime.

Having thus described my invention what I claim is 1. The process ofproducing coloring matters which consists in combining one molecule ofdiazotized beta-naphthylamin-monr sulfonic acid (2:1) with anothermolecizle ol' 2:1) diazotizing the resulting product and combining itwith one molecule of beta naphthol,

2. The coloring matter Which can be obtained from two molecules ofbcta-naphthylamin-inono-sulfonic acid (2:1) and on molecule ofbeta-naphthol, which color is of a red shade, insoluble in Water,soluble in concentrated sul uric acid with a dark crimson 'llll) shadehaving a blue undertone, encl which forms lake colors of a red shadepessessmg greed; fastne ss to light and lime. 4

3. The coloring matter having most probably the formula -Which is in theform of a bright red paste,

' rers ree ing a blue undertone, and which is capable of forming brightred lakes possessing great fastness t0 light,

In Witness whereof I have hereunto set 15 my hand in the presence of twosubscribing witnesses.

OTTO. v SIEPERMANN.

Witnesses:

GHAS, LYON RUSSELL, WM. C. DUNN. Y

